Detective work? Prune??

Article suggesting pilot's mobile devices may have caused Egyptair 804 fire
 

Pilot?s phone batteries may have caused crash that killed 66 | World | The Times & The Sunday Times

I'm sorry it's a paid for newspaper; if I find another article about it I will update with a new link.

Also, Moderators, please add this to the existing thread if you feel it appropriate - apologies that I couldn't locate it.

Now some are saying that it might have been a phone battery on the flight deck: EgyptAir MS804 crash 'may have been caused by overheating phone battery'

If that is confirmed I want to buy shares in the company that built the containment boxes for the 787 .. they are going to expand their business ...

But as it read it. it is pure speculation based on a video camera at the gate. Nothing guarantee that the F/O did not store these items , that it seems included a bottle of perfume , in his bag before take off. Most of us would normally do that.

There are hundreds of lithium battery devices aboard an aircraft, I would assume almost every aircraft in the skies has at least one pilot owned device stowed on each side of the cockpit.

It's saying that he placed them on the glaresheild, but would any pilot consider taxiing and taking off with an ipad, iPhone and bottles STILL ON the glaresheild? Doubt it very much, as such they would likely have been stowed next to the FO seat.

Of course it's possible it was a pilot owned battery that caused the problem, but a video showing them in the cockpit is evidence of nothing.

Edit: As ATC Watcher said actually!